Greenberger's CURRENT Diagnosis & Treatment Gastroenterology, Hepatology, & Endoscopy, Fourth Edition by Richard Blumberg (Editor); Norton Greenberger; Sonia Friedman; John Saltzman

Sleisenger and Fordtran's Gastrointestinal and Liver Disease- 2 Volume Set by Mark Feldman; Lawrence S. Friedman; Lawrence J. Brandt

Gastrointestinal Physiology by Leonard R. Johnson

Gastrointestinal Physiology 2/e by Kim E. Barrett

Hepatology by Erwin Kuntz; Hans-Dieter Kuntz

Netter's Gastroenterology by Martin H. Floch; C. S. Pitchumoni (Editor); Neil R. Floch (Editor); Raul Rosenthal (Editor); James Scolapio (Editor); Joseph K. Lim (Editor)

Textbook of Gastrointestinal Radiology by Richard M. Gore; Marc S. Levine